I somehow split the difference on figuring out the logic and following the wrong intuition. I took as truth each card has a color on one side and a number on t

I somehow split the difference on figuring out the logic and following the wrong intuition. I took as truth each card has a color on one side and a number on the other (see others' comments for where this could be construed as part of the thing you must prove). I knew I must flip the eight to confirm the color on its back. I intuited that I should flip the blue. I thought for a moment before deciding on my final answer, and concluded that I must flip the green to ensure that it does not have an even on the back. I pondered a moment and somehow decided that order is important, and so that I should flip the 8 first, then the green, and finally the blue in that order (not sure on how I arrived at requiring an order). I selected 8, blue, green, and was informed I was incorrect. I thought and realized that the truth of the proposition did not exclude the possibility of odds having blue backs. I arrived at the correct conclusion that I must flip the 8 and the green.